Settings: Add 8:7 display aspect ratio

Requested by users for some 256-width 240p titles (effectively 1:1 PAR
at 256x224 when overscan cropping is turned on).

src/core/settings.cpp

@@ -437,8 +437,10 @@ const char* Settings::GetDisplayCropModeDisplayName(DisplayCropMode crop_mode)
   return s_display_crop_mode_display_names[static_cast<int>(crop_mode)];
 }
 
-static std::array<const char*, 4> s_display_aspect_ratio_names = {{"4:3", "16:9", "2:1 (VRAM 1:1)", "1:1"}};
-static constexpr std::array<float, 4> s_display_aspect_ratio_values = {{4.0f / 3.0f, 16.0f / 9.0f, 2.0f / 1.0f, 1.0f}};
+static std::array<const char*, 5> s_display_aspect_ratio_names =
+  {{"4:3", "16:9", "8:7", "2:1 (VRAM 1:1)", "1:1"}};
+static constexpr std::array<float, 5> s_display_aspect_ratio_values =
+  {{4.0f / 3.0f, 16.0f / 9.0f, 8.0f / 7.0f, 2.0f / 1.0f, 1.0f}};
 
 std::optional<DisplayAspectRatio> Settings::ParseDisplayAspectRatio(const char* str)
 {

src/core/types.h

@@ -71,6 +71,7 @@ enum class DisplayAspectRatio : u8
 {
   R4_3,
   R16_9,
+  R8_7,
   R2_1,
   R1_1,
   Count

src/duckstation-sdl/sdl_host_interface.cpp

@@ -1225,7 +1225,7 @@ void SDLHostInterface::DrawSettingsWindow()
         ImGui::SameLine(indent);
         int display_aspect_ratio = static_cast<int>(m_settings_copy.display_aspect_ratio);
         if (ImGui::Combo(
-              "##display_pixel_aspect_ratio", &display_aspect_ratio,
+              "##display_aspect_ratio", &display_aspect_ratio,
               [](void*, int index, const char** out_text) {
                 *out_text = Settings::GetDisplayAspectRatioName(static_cast<DisplayAspectRatio>(index));
                 return true;